Hissi (HISS-ee) are neopets. The Hissi is a scaly Neopet. It has no legs, but a long, smooth tail and two wing-like appendages with opposable thumbs. Other distinguishing features include its narrow eyes with their slit-like pupils, its forked tongue and pointed teeth, and the spotted markings on its tail, head and wings. Its onomatopoeic name is probably intended to resemble the sound of its serpentlike voice. At about 40cm, it is a medium-sized Neopet.

TL:DR A winged snake.